nodemon-bug-repro

Reproduces a bug with nodemon 2.0.0.

The bug

When restarting a process, such as a node.js express server which has been started using the --exec option nodemon gets into an infite loop, waiting for subprocesses to finish. Reporting

[nodemon] still waiting for 2 subprocess(es) to finish...

continually in the console, interleaved with the normal messaging for restarting the process.

Running the following command and then making a change in index.js will demonstrate the problem.

npm install && npm run debug

The debug script in package.json runs nodemon with the --exec flag used to run npn run-script-start which in turn starts node index.js. (I originally noticed this issue using --exec to recompile a typescript project and then start the output with node.)

Running npm run watch in the same repro does not exhibit the behaviour, and nor does running the same command with nodemon pinned to v1.19.1.

The suspect

From the message and the versions I suspect this PR as having introduced the problem.

More Logs

 $ npm run debug

> [email protected] debug /home/josh/src/nodemon-bug-repro
> nodemon --exec 'npm run-script start'

[nodemon] 2.0.0
[nodemon] to restart at any time, enter `rs`
[nodemon] watching dir(s): *.*
[nodemon] watching extensions: js,mjs,json
[nodemon] starting `npm run-script start`

> [email protected] start /home/josh/src/nodemon-bug-repro
> node ./index.js

Listening on port 4000!
[nodemon] restarting due to changes...
User defined signal 2
[nodemon] starting `npm run-script start`
[nodemon] still waiting for 2 subprocess(es) to finish...
[nodemon] still waiting for 2 subprocess(es) to finish...
[nodemon] still waiting for 2 subprocess(es) to finish...

> [email protected] start /home/josh/src/nodemon-bug-repro
> node ./index.js

[nodemon] still waiting for 2 subprocess(es) to finish...
[nodemon] still waiting for 2 subprocess(es) to finish...
Listening on port 4000!
[nodemon] still waiting for 2 subprocess(es) to finish...
[nodemon] still waiting for 2 subprocess(es) to finish...
[nodemon] still waiting for 2 subprocess(es) to finish...
[nodemon] still waiting for 2 subprocess(es) to finish...
[nodemon] still waiting for 2 subprocess(es) to finish...
[nodemon] still waiting for 2 subprocess(es) to finish...
[nodemon] still waiting for 2 subprocess(es) to finish...
[nodemon] still waiting for 2 subprocess(es) to finish...
[nodemon] still waiting for 2 subprocess(es) to finish...
[nodemon] still waiting for 2 subprocess(es) to finish...
[nodemon] still waiting for 2 subprocess(es) to finish...
[nodemon] still waiting for 2 subprocess(es) to finish...

jaybeeuu / nodemon-bug-repro Goto Github PK